v3.26.1
Intangible assets (Details) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
IfrsStatementLineItems [Line Items]    
Balance at beginning of year $ 8,953 $ 10,514
Additions 117 164
Amortization (208) (159)
Translation adjustment 560 1,226
Balance at end of year 9,422 10,720
Disposals   (4)
Impairment   (117)
Transfer to held for sale   (904)
Gross carrying amount [member]    
IfrsStatementLineItems [Line Items]    
Intangible assets and goodwill, cost 12,338 13,154
Accumulated depreciation, amortisation and impairment [member]    
IfrsStatementLineItems [Line Items]    
Accumulated amortization (2,916) (2,434)
Goodwill [member]    
IfrsStatementLineItems [Line Items]    
Balance at beginning of year 1,297 3,038
Translation adjustment 82 262
Balance at end of year 1,379 3,052
Impairment   (117)
Transfer to held for sale   (131)
Goodwill [member] | Gross carrying amount [member]    
IfrsStatementLineItems [Line Items]    
Intangible assets and goodwill, cost 1,379 3,052
Concession [Member]    
IfrsStatementLineItems [Line Items]    
Balance at beginning of year 7,091 6,942
Additions 101 149
Amortization (150) (137)
Translation adjustment 443 895
Balance at end of year 7,485 7,075
Disposals   (4)
Transfer to held for sale   (770)
Concession [Member] | Gross carrying amount [member]    
IfrsStatementLineItems [Line Items]    
Intangible assets and goodwill, cost 9,729 8,943
Concession [Member] | Accumulated depreciation, amortisation and impairment [member]    
IfrsStatementLineItems [Line Items]    
Accumulated amortization (2,244) (1,868)
Computer software [member]    
IfrsStatementLineItems [Line Items]    
Balance at beginning of year 80 84
Additions 16 15
Amortization (22) (22)
Translation adjustment 5 10
Balance at end of year 79 87
Computer software [member] | Gross carrying amount [member]    
IfrsStatementLineItems [Line Items]    
Intangible assets and goodwill, cost 697 653
Computer software [member] | Accumulated depreciation, amortisation and impairment [member]    
IfrsStatementLineItems [Line Items]    
Accumulated amortization (618) (566)
Research And Development Project [Member]    
IfrsStatementLineItems [Line Items]    
Balance at beginning of year 2 450
Translation adjustment   59
Balance at end of year 2 506
Transfer to held for sale   (3)
Research And Development Project [Member] | Gross carrying amount [member]    
IfrsStatementLineItems [Line Items]    
Intangible assets and goodwill, cost 2 506
Patent [Member]    
IfrsStatementLineItems [Line Items]    
Balance at beginning of year 483
Amortization (36)  
Translation adjustment 30  
Balance at end of year 477  
Patent [Member] | Gross carrying amount [member]    
IfrsStatementLineItems [Line Items]    
Intangible assets and goodwill, cost 531  
Patent [Member] | Accumulated depreciation, amortisation and impairment [member]    
IfrsStatementLineItems [Line Items]    
Accumulated amortization $ (54)